Spicy Mac and Cheese

pasta shapes 

(I like cavatappi)

onion, finely chopped

roasted red pepper (jarred or home roasted), finely chopped

jalapeno peppers, seeded and finely minced

 tbsp. butter, divided

all-purpose flour

milk

cayenne pepper

onion powder

garlic powder

salt

ground black pepper

colby jack cheese, shredded

pepper jack cheese, shredded

sharp cheddar cheese, shredded

baguette or crusty Italian bread, torn into large chunks